Pitch:

Unlike our other BOS propellers, the Series 3 are ground adjustable to the required pitch and engine load. We have optimised the design to allow for this. As with all props they are at their most efficient at one optimal pitch setting, and it is this setting that we quote. The less a prop is changed from this the better the performance, although we have customers reporting excellent performance out to 7 degrees outside this parameter.

Hubs:

All BOS3 Hubs are CNC machined from only the best aviation grade 7075 T6 series alloy plate (not a cheap casting) and treated for corrosion resistance (hence the gold colour). The hubs feature a blade grip pattern that is far superior to a smooth surface, it has more grip surface area and the blade pitch is held rigid when the hub is tightened.
Hubs to suit the 75mm PCD bolt pattern, ie many Rotax, Hirth etc are available in 2B, 3B and 4B.
We also have 2B and 3B hubs for most other common bolt patterns such as Rotax C box (100mm PCD), some Subaru’s (4 inch / 101.6mm PCD) and to suit Rotax 912 / 914 (old and new with rear face drive stud holes).

Notes:

Overall propeller diameter may vary from hub to hub. For example a 72″ blade may vary from 70″ (Bolly 912 hub), 71.5″ (2B or 3B in 75mm PCD hub) or 72″ (in Bolly 4B hub or some hubs by other manufacturers).

Blade Info – Pricing

The below prices are AU$ retail inc GST and Export retail non GST

Product Code

Description

AU$ Retail

Export$ Retail

BOS3 72 x 60 S L DT

72 x 60 Stander LH – (single) adjustable blade, with DT edge

$395.00

$359.09

BOS3 72 x 60 S R DT

72 x 60 Stander RH – (single) adjustable blade, with DT edge

$395.00

$359.09

BOS3 68 x 58 S R DT

68 x 58 Stander LH – (single) adjustable blade, with DT edge

$380.00

$345.45

BOS3 68 x 58 S R DT

68 x 58 Stander RH – (single) adjustable blade, with DT edge

$380.00

$345.45

BOS3 62 x 52 S L DT

62 x 52 Stander LH – (single) adjustable blade, with DT edge

$365.00

$331.81

BOS3 62 x 52 S R DT

62 x 52 Stander RH – (single) adjustable blade, with DT edge

$365.00

$331.81

BOS3 53 x 50S R DT

53 x 50 Stander LH – (single) adjustable blade, with DT edge

$350.00

$318.18

Hub Info – Pricing

We are proud of these magnificent hubs … truly works of art. CNC machined into 7075 alumiuium plate and “gold” anodised for a great look. So good, we have given them a lifetime warranty.

Product Code

AU$ Retail

Export$ Retail

BOS3 HUB 2B

$475.00

431.81

BOS3 HUB 3B

$495.00

$450.00

BOS3 HUB 4B

$595.00

$540.90

Complete Set Prices

The below prices are AU$ retail inc GST and Export retail non GST .
The below prices INCLUDES standard prop mounting hardware (washer plate and engine mounting bolts). We need to have details of your engine and gearbox etc so we can provide the correct hardware. If your application needs something different to standard applications (ie a spacer), it will be an extra purchase, and quite often we will have it in stock.

PROP KIT

2B AU$

2B Export

3B AU$

3B Export

4B AU$

4B Export

BOS3 72″ L/H or R/H full prop kit

$1,310.00

$1,190.90

$1,725.00

$1,568.18

$2,220.00

$2,018.18

BOS3 68″ L/H or R/H full prop kit

$1,280.00

$1,163.63

$1,680.00

$1,527.27

$2,160.00

$1,963.63

BOS3 62″ L/H or R/H full prop kit

$1,250.00

$1,136.36

$1,635.00

$1,486.36

$2,100.00

$1909.09

BOS3 53 x 50 R/H full prop kit

$1,220.00

$1,109.09

$1,590.00

$1,445.45

$2,040.00

$1,854.54

Proven Setups/News

The Bolly BOS3 68 x 58 (left and right hand versions) in our standard hub (66″ 3B prop) have been certified for use in the Airborne XT series of Trikes, with Rotax 912 or 582. This entailed, amongst other things, over speed testing at mach .97 tip speed using every bit of power from a 200hp engine – an awesome experience that has given us enormous confidence in our product. And then there was the 10 ton pull test + more.

Trike with Rotax 582 3.47 gearbox using 68″ R/H blades in a BOS3 – 3B hub A perfect combination on Airborne Edge machines, winning rave reviews from the many who are using this combo.

Sapphire. The most recent tests have been the BOS3 53 x 50 SR as a 3B prop, (trimmed slightly in diameter to 60″) for use on the Sapphire. Initial feedback is
exceptionally good. We are waiting for a full report from Steve Dumnsey of Sapphire Aircraft (03 54397168).

Savannah / Lightwing etc with 100hp Rotax 912S is great when using the BOS3 72 x 58 S R blades in a BOS3-3B hub. True size 70″ 3B, or alternatively if ground
clearance or cruise speed are priorities – the same but using the BOS3 68 x 58 SR blades (true size = 66″ 3B).